heighten

For those whose loved one is dying, the cheerful nature of the season can heighten their grief and loneliness.

Despite the heightened security measures, the atmosphere seems relaxed.

Its stance, and the inability of Lebanon’s weaker army to force disarmament, is heightening tensions with Israel and the U.S.

The incident, coming as holiday tourists descend on the capital, has heightened security and raised fresh questions about domestic troop deployments, immigration policy and public safety.

The airlines had temporarily suspended their routes into the capital, Caracas, after the US warned of "heightened military activity" in the area.